Ufw stands for Uncomplicated Firewall, and is program for managing a netfilter firewall. It provides a command line interface and aims to be uncomplicated and easy to use.

Little Snitch is described as 'Firewall tool for monitoring, controlling, and alerting on outgoing network connections, with real-time user notifications and customizable rule-based access control' and is a very popular Firewall in the network & admin category. There are more than 25 alternatives to Little Snitch for a variety of platforms, including Windows, Mac, Android, Linux and iPhone apps. The best Little Snitch alternative is Portmaster, which is both free and Open Source. Other great apps like Little Snitch are LuLu by Objective-See, GlassWire, NetGuard and NetLimiter.
Ufw stands for Uncomplicated Firewall, and is program for managing a netfilter firewall. It provides a command line interface and aims to be uncomplicated and easy to use.

As soon as you’re connected to the Internet, your apps can send whatever they want to wherever they want, unnoticed by you, because all of this happens invisibly under the hood.




Lockdown Privacy is an Open Source and free firewall for your iOS device. We built the product to help protect users from app developers and analytics companies that are monetizing user data without consent or transparency.



Lockdown Privacy is the most popular iPhone & iPad alternative to Little Snitch.
A fundamental re-design of user Data Privacy. Your multi-tool for online protection. So easy your grandma could use it. Costs less than a cup of coffee per year.



Provides two-way firewall protection by blocking unauthorized network access, detecting intrusions, hiding devices from threats, stopping viruses, spyware, and data theft, offering real-time alerts, customizable rules, and simple setup with light system impact.



Firewalld provides a dynamically managed firewall with support for network/firewall zones that define the trust level of network connections or interfaces. It has support for IPv4, IPv6 firewall settings, ethernet bridges and IP sets.

Receive notifications whenever a new program connects to the network, or when it's modified



Firewalla is a vital security addition to every home and small business with network and IoT devices.



Windows 10 Firewall Control is a simple and exhaustive solution for applications network activity controlling and monitoring.




The upribox Software turns your RaspberryPi into a privacy-enhancing Wireless router with adblocking, Tor, and a VPN server.



Blocker is a component controller for Android applications that currently supports using PackageManager and Intent Firewall to manage the state of components. It can be seamlessly switched between these controllers, and for application rules, you can export and import them.



SterJo NetStalker is innovative and FREE security software able to detect all authorized and unauthorized connections to your computer and send you alert for each new connection.

It is open source. It seems good even if the last commit was 2 years ago